CN102937552B - Gate valve shell intensity and bidirectional seal testing machine - Google Patents
Gate valve shell intensity and bidirectional seal testing machine Download PDFInfo
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- CN102937552B CN102937552B CN201210506463.6A CN201210506463A CN102937552B CN 102937552 B CN102937552 B CN 102937552B CN 201210506463 A CN201210506463 A CN 201210506463A CN 102937552 B CN102937552 B CN 102937552B
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Abstract
The invention relates to a gate valve shell intensity and bidirectional seal testing machine which comprises a mechanical system, a hydraulic control system and a pressure water control system. The gate valve shell intensity and bidirectional seal testing machine is characterized in that the mechanical system is provided with a left support, a right support, a left cavity seal clamping disc and a right cavity seal clamping disc, wherein the left cavity seal clamping disc and the right cavity seal clamping disc are arranged between the left support and the right support, and are used for sealing and compression-connecting overflow hole end surfaces at two sides of the gate valve; the inner sides of the left support and the right support are fixedly connected with a left connecting disc; the left cavity seal clamping disc is movably connected to the left support through the left connecting disc; an upper horizontally placed guide post and a lower horizontally placed guide post are connected between the left support and the right support; the right cavity seal clamping disc is sleeved on the upper guide post and the lower guide post in a sliding fit mode; a hydraulic cylinder connected with the hydraulic control system horizontally penetrates through the right support and is fixedly installed on the right support; a piston rod of the hydraulic cylinder is fixedly connected to the right cavity seal clamping disc; the left cavity seal clamping disc and the right cavity seal clamping disc are respectively connected with a left disc connecting channel and a right disc connecting channel and are connected with the pressure water control system; and a movable support for supporting the gate valve is arranged. The gate valve shell intensity and bidirectional seal testing machine provided by the invention has the advantages of operation simplification, working efficiency improvement, quantitative measurement and water resource conservation.
Description
Technical field
The present invention relates to a kind of gate valve performance test apparatus, particularly relate to a kind of gate valve shell intensity and two way seal testing machine.
Background technology
Gate valve, as a kind of medium being used for connecting or block in pipeline of block valve class, is indispensable opertaing device in water system, is mainly used in the environment for use of pipe network, pump house and filter tank equal pressure pipeline.Gate valve forms primarily of valve body, valve gap, valve rod, the flashboard be connected with valve rod, valve seat, filler assembly and gearing.Valve body is the main body of gate valve, it is the strength member installed valve gap, lay valve seat, connecting tube, valve body and valve gap form withstand voltage cavity by Flange joint, form gate valve casing, valve rod is connected with stem nut or gearing, play a part carry-over moment and open and close flashboard, flashboard, under the drive of valve rod, is done elevating movement along sealing surface of seat and reaches keying object.Gate valve is applicable to not need frequent keying usually, and keeps the operating mode of flashboard standard-sized sheet or full cut-off.The opening and closing element of gate valve is flashboard, and direction of motion and the flow direction of flashboard are perpendicular.Flashboard has two sealing surfaces, and the most frequently used pattern is that two sealing surfaces of slide valve form wedge shape, wedge angle is different with valve parameter.When gate valve is closed, sealing surface can only rely on pressure medium to seal, and namely relies on pressure medium the sealing surface of flashboard to be pressed to the valve seat of opposite side to ensure the sealing of sealing surface.Its advantage is that fluid resistance is little, and sealing surface is little by washing away and corroding of medium, and opening and closing is more laborsaving.Medium flows to unrestricted, not flow-disturbing, do not reduce pressure and body is simple, structure length is short, anufacturability is good.
In view of gate valve is as the environment for use of opening and closing device for pressure pipeline, very strict requirement is had to its intensity and sealing property, therefore in process of production and the last stage of dispatching from the factory all to do casing rigidity and experiments of sealing performance, two-way pressure testing must be carried out to gate valve, namely close valve plate and respectively two way seal test is carried out to the pressure that valve plate bilateral cavity adds regulation at the appointed time.Existing testing apparatus generally comprises the mechanical system of clamping gate valve, control gate valve clamping, pressurize or the hydraulic control system of unclamping and the press water control system of press water is provided to gate valve, but its defect is clamped one time can only complete the unidirectional pressure testing of gate valve, therefore must clamping gate valve repeatedly in test process, complex operation, inefficiency; And because there is no accurate leakage rate reading device, be not easy to quantitative test, be unfavorable for quick solution leakage problem; In addition, adopt open pipeline, carry out water-stop test, waste water source, easily affects test environment.
Summary of the invention
Fundamental purpose of the present invention is for the problems referred to above, there is provided a kind of there is leakage rate read functions and adopt water circulation to close gate valve shell intensity and the two way seal testing machine of pipeline, realize the two way seal test that clamped one time can complete gate valve, reach and simplify the operation, increase work efficiency, quantitative test and save the effect of water resource.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of gate valve shell intensity and two way seal testing machine, comprise the mechanical system of clamping gate valve, control gate valve compresses, pressurize or the hydraulic control system of unclamping and the press water control system of press water is provided to gate valve, it is characterized in that described mechanical system is provided with a left side, the left side that the right side is oppositely arranged, right support, be positioned at a left side, for the left chamber sealed clamping dish of the coaxial line set of the gate valve both sides flowing hole end face of sealing pressing water receiving horizontal position and right chamber sealed clamping dish between right support, left terminal pad is fixedly connected with inside left socle, described left chamber sealed clamping dish is movably connected on left socle by left terminal pad, on a left side, connect between right support horizontally disposed on, lower guide pillar, described right chamber sealed clamping dish be sleeved on to be slidably matched described on, on lower guide pillar, cross right support to be fixedly mounted with one thereon with right chamber sealed clamping dish coaxial line and to be connected the hydraulic cylinder of described hydraulic control system, hydraulic cylinder piston rod is fixedly connected with right chamber sealed clamping dish, left, right chamber sealed clamping dish arranges left dish respectively, and even chamber passage and right dish connect chamber passage, and respectively by water pipe Bonding pressure water control system, movable supporting frame for supporting gate valve is set below the gate valve detected.
Described left and right chamber sealed clamping dish medial surface is respectively equipped with some concentric ring recesses, setting-in rubber seal in described annular groove.
Described press water control system is comprised the hydraulic pressure tensimeter, the liquid level that are connected by water pipe and takes into account high-pressure ball valve (20) ~ (27), left chamber unloader (28) and right chamber unloader (29); The water inlet of high-pressure ball valve (21), (22) connects low pressure water source and high-pressure water respectively, the water delivering orifice of high-pressure ball valve (21), (22) connects described left and right dish connect chamber passage respectively by high-pressure ball valve (23), (24), and described liquid level meter connects left and right dish connect chamber passage respectively by high-pressure ball valve (25), (26); Described hydraulic pressure tensimeter connects left and right dish connect chamber passage respectively by high-pressure ball valve (27), (20), and left chamber unloader (28) and right chamber unloader (29) are connected left and right dish respectively and connect chamber passage.
Left chamber unloader (28) connecting the described left and right company of coiling chamber passage is respectively connected with the water delivering orifice in right chamber unloader (29) recovery tank be communicated with water source respectively by water pipe.
Described hydraulic control system comprise connected by oil pipeline fuel tank, oil absorption filter, oil pump, remote pressure regulating valve, surplus valve, there is the three-position four-way electromagnetic directional valve of A, P, B, R mouth, there is the hydraulic control one-way valve of A ', B ', C mouth, ball valve and oil pressure tensimeter; Its connection is: described oil pump input port connects described fuel tank by described oil absorption filter, and oil pump delivery outlet connects the P mouth of described solenoid directional control valve and the oil-in of described surplus valve respectively; The A mouth of solenoid directional control valve connects the rod chamber of described hydraulic cylinder and the C mouth of hydraulic control one-way valve respectively, and the rodless cavity of hydraulic cylinder connects the B ' mouth of described ball valve one end and hydraulic control one-way valve respectively, and the ball valve other end connects oil pressure tensimeter; A ' the mouth of hydraulic control one-way valve connects the B mouth of solenoid directional control valve, and the oil-out of surplus valve connects the oil-in of described remote pressure regulating valve, and the R mouth of solenoid directional control valve, the oil-out of surplus valve and the oil-out of remote pressure regulating valve all connect fuel tank.
The invention has the beneficial effects as follows: clamped one time completes two way seal pressure testing and Strength test, save the clamping time, simplify the operation, increasing work efficiency, simultaneously by reading liquid level meter numerical value, the accurate leakage rate of gate valve can be obtained, contribute to accurate analysis judge leakaging cause and solve in time, in addition adopt the water circulation that recovery tank is set at pressure testing scene to close pipeline, make examination hydraulic water return to water source by recovery tank and recycle, save water resource and create good test environment.
Accompanying drawing explanation
Fig. 1 is general structure block diagram of the present invention;
Fig. 2 is mechanical system structure schematic diagram of the present invention;
Fig. 3 is the structural representation of press water control system of the present invention;
Fig. 4 a is hydraulic control system structural representation of the present invention;
Fig. 4 b is hydraulic control system cylinder left lateral principle of work schematic diagram of the present invention;
Fig. 4 c is hydraulic control system cylinder backhaul principle of work schematic diagram of the present invention;
Fig. 5 is the structural representation of mechanical system of the present invention under gate valve two way seal trystate;
Fig. 6 is the control circuit structural drawing of hydraulic system.
In figure: 1 mechanical system, 11 left socles, 12 left terminal pads, 13 left chamber sealed clamping dishes, 131 bracket panels, 132 horizontal brace rods, 14 right chamber sealed clamping dishes, 15 guide pillars, 16 right supports, 17 hydraulic cylinders, 171 piston rods, 18 movable supporting frames, 19 rubber seal, the left dish of 1a connects chamber passage, the right dish of 1b connects chamber passage, 2 press water control system, 2a low pressure water source, 2b high-pressure water, 20 ~ 27 high-pressure ball valves, 28 left chamber unloaders, 29 right chamber unloaders, 201 hydraulic pressure tensimeters, 202 liquid level meters, 203 water pipes, 204 recovery tanks, 3 hydraulic systems, 30 oil pipelines, 31 oil pressure tensimeters, 32 ball valves, 33 hydraulic control one-way valves, 34 solenoid directional control valves, 35 surplus valves, 36 remote pressure regulating valves, 37 oil pumps, 38 oil absorption filters, 39 fuel tanks, 4 gate valves, the 41 left chambeies of gate valve, the 42 right chambeies of gate valve, 5 water sources.
Below in conjunction with drawings and Examples to the detailed description of the invention.
Embodiment
Fig. 1 ~ Fig. 6 illustrates a kind of gate valve shell intensity and two way seal testing machine, comprise the mechanical system 1 of clamping gate valve, control gate valve 4 to compress, pressurize or the hydraulic control system 3 of unclamping and the press water control system 2 of press water is provided to gate valve, it is characterized in that above-mentioned mechanical system 1 is provided with a left side, the left side that the right side is oppositely arranged, right support 11, 16, be positioned at a left side, for the left chamber sealed clamping dish 13 of the coaxial line set of the gate valve 4 both sides flowing hole end face of sealing pressing water receiving horizontal position and right chamber sealed clamping dish 14 between right support, left terminal pad 12 is fixedly connected with inside left socle 11, above-mentioned left chamber sealed clamping dish 13 is movably connected on left socle 11 by left terminal pad 12.In actual applications, left chamber sealed clamping dish 13 is the knockdown pieces be connected by securing member with left terminal pad 12, be made up of left chamber sealed clamping dish 13 and being fixedly connected with by horizontal brace rod 132 with its parallel bracket panel 131, according to gate valve different size, the left chamber sealed clamping dish of different length horizontal brace rod can be adopted, to adapt to device structure needs.Above-mentioned left and right chamber sealed clamping dish 13,14 medial surface is respectively equipped with some concentric ring recesses, setting-in rubber seal 19 in annular groove.Ensure to be tightly connected when engaging with gate valve 4 both sides flowing hole face clamping like this.Between left and right support 11,16, connect horizontally disposed upper and lower guide pillar 15, right chamber sealed clamping dish 14 is slidably matched with the guide pillar slide opening arranged corresponding on its edge and is sleeved on upper and lower guide pillar 15.Cross right support to be fixedly mounted with one thereon with right chamber sealed clamping dish 14 coaxial line and to be connected the hydraulic cylinder 17 of above-mentioned hydraulic control system 3, hydraulic cylinder piston rod 171 is fixedly connected with right chamber sealed clamping dish 14, left and right chamber sealed clamping dish 13,14 arranges left dish company chamber passage 1a respectively and right dish connects chamber passage 1b, and respectively by water pipe Bonding pressure water control system 2; As shown in Fig. 2, Fig. 5, left dish company chamber passage 1a and right dish connect chamber passage 1b and are separately positioned on card center and by water pipe 203, left and right for gate valve chamber 41,42 are connected to press water control system 2.Because gate valve has constant weight, for fixedlying positioning, the movable supporting frame 18 for supporting gate valve is set below the gate valve 4 detected.In the present embodiment, movable supporting frame is fixed on by vertical bracing frame on band roller trolley car body to form stent car, easy to use simple and direct.
Above-mentioned press water control system 2 comprises the hydraulic pressure tensimeter 201, liquid level meter 202 and the high-pressure ball valve 20-27 that are connected by water pipe 203, left chamber unloader 28 and right chamber unloader 29; The water inlet of high-pressure ball valve 21,22 connects low pressure water source 2a and high-pressure water 2b respectively, here: low pressure water source force value≤1.6MPa; 20.0MPa> high-pressure water force value >1.6MPa.Water under high pressure and low-pressure water are provided by the pressure pump at water source 5.The water delivering orifice of high-pressure ball valve 21,22 connects above-mentioned left and right dish respectively by high-pressure ball valve 23,24 and connects chamber passage 1a, 1b, and above-mentioned liquid level meter 202 connects left and right dish respectively by high-pressure ball valve 25,26 and connects chamber passage; Hydraulic pressure tensimeter 201 connects left and right dish respectively by high-pressure ball valve 27,20 and connects chamber passage, left chamber unloader 28 and right chamber unloader 29 are connected left and right dish respectively and connect chamber passage, and left chamber unloader 28 is connected with the water delivering orifice of right chamber unloader 29 recovery tank 204 be communicated with water source respectively by water pipe.
In reality test, according to the gate valve DN50-DN300 of different size, the pressure test pressure of gate valve is different with the time, concrete operative norm GB/T 13927-2008 " industrial valve pressure test ", UL262-2004 " gate valve on fire-fighting system water supply line " and FM1120-2008 " on fire-fighting system water supply line gate valve ".
As shown in fig. 4 a, above-mentioned hydraulic control system 3 comprise connected by oil pipeline 30 fuel tank 39, oil absorption filter 38, oil pump 37, remote pressure regulating valve 36, surplus valve 35, there is the three-position four-way electromagnetic directional valve 34 of A, P, B, R mouth, there is the hydraulic control one-way valve 33 of A ', B ', C mouth, ball valve 32 and oil pressure tensimeter 31; Concrete connection is: the input port of above-mentioned oil pump 37 connects fuel tank 39 by oil absorption filter 38, and the delivery outlet of oil pump 37 connects the P mouth of solenoid directional control valve 34 and the oil-in of surplus valve 35 respectively; The A mouth rod chamber of connecting fluid cylinder pressure 17 and the C mouth of hydraulic control one-way valve 33 respectively of solenoid directional control valve, the rodless cavity of hydraulic cylinder 17 connects the B ' mouth of above-mentioned ball valve 32 one end and hydraulic control one-way valve respectively, and ball valve 32 other end connects oil pressure tensimeter 31; A ' the mouth of hydraulic control one-way valve 33 connects the B mouth of solenoid directional control valve 34, and the oil-out of surplus valve connects the oil-in of remote pressure regulating valve 36, and the oil-out of the R mouth of solenoid directional control valve 34, the oil-out of surplus valve 35 and remote pressure regulating valve 36 all connects fuel tank 39.Above-mentioned oil pump 37 adopts ram pump, is rotarily driven by oil pump drive motor D1.
Fig. 6 is the control circuit schematic diagram of hydraulic system.
See Fig. 5, Fig. 4 a ~ Fig. 4 c, Fig. 6, the principle of work of hydraulic control system is:
In Fig. 4 b ~ Fig. 4 c, solid arrow represents and enters cylinder pressure oil flow direction, and dotted arrow represents the flow direction of efflux cylinder pressure pressure oil.
Clamping gate valve operation: first oil pressure tensimeter 31 is adjusted to setting value, close air switch SQ and introduce L1, L2, L3 three-phase voltage, and be supplied to circuit through fuse FU1, press scram button SA, power light HL1 is bright, press pump start button SB1 again, HL2 is bright for oil pump pilot lamp, and now, contactor KM1 is energized, started by contactless contactor KM1a control oil pump drive motor D1, oil pump 37 operates; Press left lateral button SB3, relay K A1 is energized, the electromagnet DT2 being controlled solenoid directional control valve 34 by relay contact KA1a is energized, then the P mouth of solenoid directional control valve 34, B mouth are connected, A mouth, R mouth are connected, and pressure oil flows to the rodless cavity of hydraulic cylinder 17 to B ' mouth through the A ' mouth of hydraulic control one-way valve 33, the pressure oil of rod chamber flows back to fuel tank 39 through A mouth, R mouth, piston rod 171 left lateral, produces the action of clamping gate valve.After clamping, unclamp left lateral button SB3, now, the electromagnet DT2 power-off of solenoid directional control valve 34, spring reset.The oil-in of remote pressure regulating valve 36 is connected within the scope of the set pressure of surplus valve 35, realizes long-range pressure regulation.Hydraulic control one-way valve 33 pressurize.
Unclamp gate valve operation: press backhaul button SB4, the electromagnet DT1 of solenoid directional control valve 34 is energized, then the P mouth of solenoid valve reversal valve, A mouth are connected, R mouth, B mouth are connected, now activate the C oil circuit control of hydraulic control one-way valve 33, pressure oil enters hydraulic cylinder rod chamber through P mouth, A mouth, and pressure oil returns fuel tank through the B ' mouth of hydraulic control one-way valve to A ' mouth efflux cylinder pressure from hydraulic cylinder rodless cavity, piston rod 171 right lateral returns, and produces the action of unclamping gate valve.After gate valve unclamps, unclamp backhaul button SB4, the electromagnet DT1 power-off of solenoid directional control valve and spring reset.The oil-in of remote pressure regulating valve 36 is connected within the scope of the set pressure of surplus valve 35, realizes long-range pressure regulation.Hydraulic control one-way valve 33 pressurize.
The specific operation process of gate valve shell intensity provided by the invention and two way seal testing machine is as follows:
Being the pressure test pressure of DN50-DN300 gate valve and pressure testing time for specification is: Seal test pressure is 4.2MPa, and the time is 60S, and the pressure of the two-way pressure-resistant seal test in the left and right chamber of gate valve is 3.1MPa (water under high pressure), and the time is 15S.Above-mentioned data carry out adaptation adjustment according to the requirement of different client by relevant criterion.
Table 1 illustrates that corresponding specification is the gate valve of DN50 ~ DN300, realizes the oil pressure value of hydraulic cylinder clamping gate valve.The maximum pressure of oil circuit is 0-40MPa.Table 2 illustrates that corresponding specification is pressure test pressure and the pressure testing time of the gate valve of DN50 ~ DN300.
The pressure of table 1 hydraulic cylinder clamping gate valve
| DN mm | Pressure MPa |
| 50 | 0.5 |
| 65 | 0.8 |
| 80 | 1.3 |
| 100 | 2.0 |
| 125 | 3.1 |
| 150 | 4.4 |
| 200 | 7.9 |
| 250 | 12.3 |
| 300 | 17.7 |
The pressure test pressure of table 2 gate valve and pressure testing time (DN50-DN300)
| GB/T 13927-2008 | UL 262-2004 | FM 1112-2009 | |
| The Shell test time | 60S | 15S | 60S |
| Pressure | 1.5 times of working pressures | 2 times of working pressures | 2 times of working pressures |
| The leakage test time | 15S | 15S | 15S |
| Pressure | 1.1 times of working pressures | 1.5 times of working pressures | 1 times of working pressure |
To test gate valve DN50, working pressure is 2.5MPa, and performing GB/T 13927-2008 standard is example
Concrete steps are as follows:
1. clamping gate valve, slings gate valve 4 with overhead traveling crane, is placed between left chamber sealed clamping dish 13 and right chamber sealed clamping dish 14 near sealed clamping dish side, left chamber.And center overlaps with left and right chamber sealed clamping disk center.Now press scram button SA, the bright HL1 of power light, then press pump start button SB1, start oil pump 37.Press left lateral button SB3 again, oil pressure value is that 0.5MPa clamps gate valve.
2. housing pressure testing:
First entirely opened by gate valve 4 valve plate, open high-pressure ball valve 22 and connect high-pressure water 2b, all the other high-pressure ball valves are all in closed condition.Open high-pressure ball valve 27,28, slowly open high-pressure ball valve 24.Treat that high-pressure ball valve 28 overflows test medium and bubble-free phenomenon is closed.Handle the given rated pressure 3.75MPa of high-pressure ball valve 24, pressurize 60S.High-pressure ball valve 28 off-load is opened after pressure testing terminates.
3. left chamber sealing pressure testing
Closed according to torque value by gate valve 4, open high-pressure ball valve 23,26,27, all the other high-pressure ball valves are all in closed condition.By the water level height of high-pressure ball valve 25,29 regulating liquid surface meter 202, be adjusted to 10ml scale.Slow unlatching high-pressure ball valve 22, is monitored by hydraulic pressure tensimeter 201, is forced into rated pressure 2.75MPa, observes the change in location of liquid level meter 202 water, and water level raises and illustrates that gate valve leaks, if water level unchanged explanation leakage test is qualified.In this example, liquid level meter level scale is still 10ml after pressurize 15S, illustrates that valve seal is qualified.High-pressure ball valve 28 off-load is opened after end.
4. right chamber sealing pressure testing
Closed according to torque value by gate valve 4, open high-pressure ball valve 24,25,20, all the other high-pressure ball valves are all in closed condition.By the water level height of high-pressure ball valve 26,28 regulating liquid surface meter 202, be adjusted to 10ml scale.Slow unlatching high-pressure ball valve 22, is monitored by hydraulic pressure tensimeter 201, is forced into rated pressure 2.75MPa.Observe the change in location of liquid level meter 202 water, in this example, liquid level meter level scale water level after pressurize 15S is increased to 15ml, illustrates that gate valve leaks.Open high-pressure ball valve 29 off-load.
5. pressure testing is complete, now presses backhaul button SB4, unclamps gate valve, hung out by gate valve, and by oil pump stop button SB2, oil pump pilot lamp HL2 extinguishes, and oil pump drive motor D1 stops, and oil pump 37 shuts down.Press scram button SA, power light HL1 extinguishes.Close air switch SQ again, cut off the electricity supply.
Above content not does any pro forma restriction to structure of the present invention, shape and material.Every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (4)
1. a gate valve shell intensity and two way seal testing machine, comprise the mechanical system of clamping gate valve, control gate valve compresses, pressurize or the hydraulic control system of unclamping and the press water control system of press water is provided to gate valve, it is characterized in that described mechanical system is provided with a left side, the left side that the right side is oppositely arranged, right support, be positioned at a left side, for the left chamber sealed clamping dish of the coaxial line set of the gate valve both sides flowing hole end face of sealing pressing water receiving horizontal position and right chamber sealed clamping dish between right support, left terminal pad is fixedly connected with inside left socle, described left chamber sealed clamping dish is movably connected on left socle by left terminal pad, on a left side, connect between right support horizontally disposed on, lower guide pillar, described right chamber sealed clamping dish be sleeved on to be slidably matched described on, on lower guide pillar, cross right support to be fixedly mounted with one thereon with right chamber sealed clamping dish coaxial line and to be connected the hydraulic cylinder of described hydraulic control system, hydraulic cylinder piston rod is fixedly connected with right chamber sealed clamping dish, left, right chamber sealed clamping dish arranges left dish respectively, and even chamber passage and right dish connect chamber passage, and respectively by water pipe Bonding pressure water control system, movable supporting frame for supporting gate valve is set below the gate valve detected, described press water control system is comprised the hydraulic pressure tensimeter, the liquid level that are connected by water pipe and takes into account high-pressure ball valve (20) ~ (27), left chamber unloader (28) and right chamber unloader (29), the water inlet of high-pressure ball valve (21), (22) connects low pressure water source and high-pressure water respectively, the water delivering orifice of high-pressure ball valve (21), (22) connects described left and right dish connect chamber passage respectively by high-pressure ball valve (23), (24), and described liquid level meter connects left and right dish connect chamber passage respectively by high-pressure ball valve (25), (26), described hydraulic pressure tensimeter connects left and right dish connect chamber passage respectively by high-pressure ball valve (27), (20), and left chamber unloader (28) and right chamber unloader (29) are connected left and right dish respectively and connect chamber passage.
2. gate valve shell intensity according to claim 1 and two way seal testing machine, is characterized in that being respectively equipped with some concentric ring recesses, setting-in rubber seal in described annular groove on the sealed clamping dish medial surface of described left and right chamber.
3. gate valve shell intensity according to claim 1 and 2 and two way seal testing machine, is characterized in that left chamber unloader (28) connecting the described left and right company of coiling chamber passage is respectively connected with the water delivering orifice in right chamber unloader (29) recovery tank be communicated with water source respectively by water pipe.
4. gate valve shell intensity according to claim 1 and 2 and two way seal testing machine, it is characterized in that described hydraulic control system comprise connected by oil pipeline fuel tank, oil absorption filter, oil pump, remote pressure regulating valve, surplus valve, there is the three-position four-way electromagnetic directional valve of A, P, B, R mouth, there is the hydraulic control one-way valve of A ', B ', C mouth, ball valve and oil pressure tensimeter; Its connection is: described oil pump input port connects described fuel tank by described oil absorption filter, and oil pump delivery outlet connects the P mouth of described solenoid directional control valve and the oil-in of described surplus valve respectively; The A mouth of solenoid directional control valve connects the rod chamber of described hydraulic cylinder and the C mouth of hydraulic control one-way valve respectively, and the rodless cavity of hydraulic cylinder connects the B ' mouth of described ball valve one end and hydraulic control one-way valve respectively, and the ball valve other end connects oil pressure tensimeter; A ' the mouth of hydraulic control one-way valve connects the B mouth of solenoid directional control valve, and the oil-out of surplus valve connects the oil-in of described remote pressure regulating valve, and the R mouth of solenoid directional control valve, the oil-out of surplus valve and the oil-out of remote pressure regulating valve all connect fuel tank.
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| CN201210506463.6A CN102937552B (en) | 2012-11-29 | 2012-11-29 | Gate valve shell intensity and bidirectional seal testing machine |
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| CN202947844U (en) * | 2012-11-29 | 2013-05-22 | 天津银河阀门有限公司 | Strength and bidirectional seal testing machine for gate valve case |
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2012
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| US4520655A (en) * | 1981-12-18 | 1985-06-04 | Gordon E. Eldridge | Valve testing apparatus |
| CN2526826Y (en) * | 2002-03-14 | 2002-12-18 | 华东船舶工业学院 | Nondestructive tester for pipe fitting |
| CN202947844U (en) * | 2012-11-29 | 2013-05-22 | 天津银河阀门有限公司 | Strength and bidirectional seal testing machine for gate valve case |
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| CN102937552A (en) | 2013-02-20 |
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Effective date of registration: 20210803 Address after: 300350 No.49 Guanghui Road, beizhakou Town, Jinnan District, Tianjin Patentee after: TIANJIN GALAXY VALVE Co.,Ltd. Patentee after: Tianjin Yinhe Ouhua metal products Co.,Ltd. Address before: 300350 No. 15, Tianhua Road, Balitai Industrial Park, Jinnan District, Tianjin Patentee before: TIANJIN GALAXY VALVE Co.,Ltd. |